Importing PyQt5* fails on Mac

[Grzegorz Bokota]

Googling provides information that when code is build using XCode 14 with
c++17 mode, it will not work with macOS Ventura arm64 (lack of symbols in
libc++) . Did PyQt5 require  c++17, or could it be compiled with an older
version?

Regards,
Grzegorz Bokota

czw., 2 lis 2023 o 19:34 Grzegorz Bokota <g.bokota at mimuw.edu.pl> napisał(a):

> Dear Phil,
> I just tested PyQt5 wheels on macos 13.2.1 and got:
>
> In [2]: from PyQt5.QtWidgets import QApplication, QLabel
>    ...:
> ---------------------------------------------------------------------------
> ImportError                               Traceback (most recent call last)
> Cell In[2], line 1
> ----> 1 from PyQt5.QtWidgets import QApplication, QLabel
>
> ImportError:
> dlopen(/Users/sobolp/micromamba/envs/napari-419/lib/python3.11/site-packages/PyQt5/
> QtWidgets.abi3.so, 0x0002): Symbol not found:
> __ZTVNSt3__13pmr25monotonic_buffer_resourceE
>   Referenced from: <8239A761-D3BE-396C-A445-F703655273B5>
> /Users/sobolp/micromamba/envs/napari-419/lib/python3.11/site-packages/PyQt5/Qt5/lib/QtWidgets.framework/Versions/5/QtWidgets
>   Expected in:     <3EE92404-8FC3-374B-A598-D5C9A8CD64B5>
> /usr/lib/libc++.1.dylib
>
> The wheels are tagged as 11.0 compatible. Also, wheels on from riverbank
> pypi (https://www.riverbankcomputing.com/pypi/) are working without any
> problem on this machine. could you chek what may have men changed and
> rebuilt the wheels?
>
> Regards,
> Grzegorz Bokota
>
>
>
>
> wt., 31 paź 2023 o 11:41 Phil Thompson <phil at riverbankcomputing.com>
> napisał(a):
>
>> On 31/10/2023 08:05, ullix wrote:
>> > This one-liner fails on Mac (macbook air M1, OS Big Sur 11.6):
>> >
>> >    fromPyQt5.QtWidgetsimport*
>> >
>> > with this output on Py3.10 and same on Py3.11:
>> >
>> >    python3.10 test4mac.py Exception:
>> >
>> > dlopen(/opt/homebrew/lib/python3.10/site-packages/PyQt5/
>> QtWidgets.abi3.so,
>> >    2): Symbol not found: __ZTVNSt3__13pmr25monotonic_buffer_resourceE
>> >    Referenced from:
>> >
>> >
>> /opt/homebrew/lib/python3.10/site-packages/PyQt5/Qt5/lib/QtCore.framework/Versions/5/QtCore
>> >    Expected in: /usr/lib/libc++.1.dylib in
>> >
>> >
>> /opt/homebrew/lib/python3.10/site-packages/PyQt5/Qt5/lib/QtCore.framework/Versions/5/QtCore
>> >    python3.11 test4mac.py Exception:
>> >
>> >
>> dlopen(/Users/alkaddy/Library/Python/3.11/lib/python/site-packages/PyQt5/
>> QtWidgets.abi3.so,
>> >    2): Symbol not found: __ZTVNSt3__13pmr25monotonic_buffer_resourceE
>> >    Referenced from:
>> >
>> >
>> /Users/alkady/Library/Python/3.11/lib/python/site-packages/PyQt5/Qt5/lib/QtCore.framework/Versions/5/QtCore
>> >    Expected in: /usr/lib/libc++.1.dylib in
>> >
>> >
>> /Users/alesandro/Library/Python/3.11/lib/python/site-packages/PyQt5/Qt5/lib/QtCore.framework/Versions/5/QtCore
>> >
>> >
>> > The tiny test program is attached.
>> > The PyQt stuff had been installed with:
>> >
>> >    |python3 -m pip uninstall PyQt5 PyQt5-sip|
>> >
>> > Any guidance? Thanks.
>> > ullix
>>
>> It's possibly an issue with your version of macOS. The Qt wheels are
>> built with Xcode 15 on Ventura.
>>
>> Phil
>>
>
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